C9bD Climate Change and Atmospheric Pollutants: Exam Drill

AQA 8464 · Calculator allowed · about 40 minutes

Total Marks

Name: _______________________________ Date: ____ / ____ / ______

Answer ALL questions. Show all your working.

Name one greenhouse gas produced by human activities that contributes to global warming.

(a)Name one greenhouse gas produced by human activities that contributes to global warming.(1)

(Total for Question 1 is 1 mark)

Complete the sentence. The enhanced greenhouse effect is the increase in the Earth's average temperature caused by an increase in the concentration of gases that trap ______ in the atmosphere.

(a)Write the missing word.(2)

(Total for Question 2 is 2 marks)

State one major human activity that increases atmospheric carbon dioxide concentration.

(a)State one major human activity that increases atmospheric carbon dioxide concentration.(2)

(Total for Question 3 is 2 marks)

The global warming potential (GWP) of methane (CH4) over 100 years is about 28 times that of CO2. A farm emits 4.5 tonnes of CH4 in a year. Calculate the CO2-equivalent emissions from this methane in tonnes CO2-e. Show your working.

(a)Calculate the CO2-equivalent emissions from 4.5 tonnes CH4. Use GWP = 28.(3)

(Total for Question 4 is 3 marks)

Sulfur dioxide (SO2) is an atmospheric pollutant formed when sulphur impurities in fuels are burned. Give two environmental problems caused by SO2.

(a)Give two environmental problems caused by SO2.(3)

(Total for Question 5 is 3 marks)

A factory releases 1500 kg of CO2 per day. The company wants to report this as tonnes per year. Calculate the total annual CO2 emissions in tonnes. Show working and state the unit.

(a)Convert 1500 kg per day to tonnes per year.(4)

(Total for Question 6 is 4 marks)

Mark scheme · C9bD Climate Change and Atmospheric Pollutants: Exam Drill

Question 1

(a) B1 one valid greenhouse gas: carbon dioxide or methane or nitrous oxide or fluorinated gases, cao
(a) Answer: Carbon dioxide

Question 2

(a) B1 heat cao
(a) B1 accept thermal energy as an alternative wording
(a) Answer: heat

Question 3

(a) B1 burning fossil fuels (for example: coal, oil, gas) cao
(a) B1 an additional supporting detail, for example naming a use such as electricity generation or transport, oe
(a) Answer: Burning fossil fuels for energy or transport

Question 4

(a) M1 method: multiplies mass CH4 by GWP (4.5 x 28) or shows equivalent calculation
(a) A1 126 tonnes CO2-e cao
(a) B1 unit given: tonnes CO2-e
(a) Answer: 126 tonnes CO2-e

Question 5

(a) B1 acid rain formation (SO2 leads to acid rain) or damage to buildings and statues, oe
(a) B1 harm to plant life or reduced crop yield, oe
(a) B1 respiratory health problems in humans or increased air pollution, oe
(a) Answer: Any two of: acid rain that damages buildings, harm to plants and crops, respiratory health problems in people.

Question 6

(a) M1 method: converts kg to tonnes and multiplies by days per year or shows 1500 kg x 365 then divide by 1000
(a) A1 547.5 tonnes cao
(a) B1 working shown: 1500 x 365 = 547500 kg then 547500 / 1000 = 547.5 tonnes
(a) B1 unit stated: tonnes or t
(a) Answer: 547.5 tonnes

Climate Change and Atmospheric Pollutants: Exam Drill - Worksheets, Questions and Revision